package com.xuecheng.content.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.xuecheng.base.exception.XueChengPlusException;
import com.xuecheng.base.model.PageParams;
import com.xuecheng.base.model.PageResult;
import com.xuecheng.content.mapper.CourseBaseMapper;
import com.xuecheng.content.mapper.CourseCategoryMapper;
import com.xuecheng.content.mapper.CourseMarketMapper;
import com.xuecheng.content.model.dto.AddCourseDto;
import com.xuecheng.content.model.dto.CourseBaseInfoDto;
import com.xuecheng.content.model.dto.EditCourseDto;
import com.xuecheng.content.model.dto.QueryCourseParamsDto;
import com.xuecheng.content.model.entity.CourseBase;
import com.xuecheng.content.model.entity.CourseCategory;
import com.xuecheng.content.model.entity.CourseMarket;
import com.xuecheng.content.service.CourseBaseInfoService;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.time.LocalDateTime;
import java.util.Date;
import java.util.List;

/**
 * @author yellow Doctor
 * @date 2025-11-17
 * @desc https://blog.csdn.net/hekai7217
 */
@Service
public class CourseBaseInfoServiceImpl implements CourseBaseInfoService {

    @Autowired
    CourseBaseMapper courseBaseMapper;
    @Autowired
    private DataSourceTransactionManager transactionManager;

    @Override
    public PageResult<CourseBase> queryCourseBaseList(PageParams pageParams, QueryCourseParamsDto queryCourseParamsDto) {

        //构建查询条件对象
        LambdaQueryWrapper<CourseBase> queryWrapper =
                new LambdaQueryWrapper<>();
        //构建查询条件，根据课程名称查询
        queryWrapper.like(StringUtils.isNotEmpty(
                        queryCourseParamsDto.getCourseName()),
                CourseBase::getName,
                queryCourseParamsDto.getCourseName());

        //构建查询条件，根据课程审核状态查询
        queryWrapper.eq(StringUtils.isNotEmpty(
                        queryCourseParamsDto.getAuditStatus()),
                CourseBase::getAuditStatus,
                queryCourseParamsDto.getAuditStatus());

        //构建查询条件，根据课程发布状态查询
        //todo:根据课程发布状态查询

        //分页对象
        Page<CourseBase> page = new Page<>(
                pageParams.getPageNo(), pageParams.getPageSize());

        // 查询数据内容获得结果
        Page<CourseBase> pageResult = courseBaseMapper.selectPage(page, queryWrapper);
        // 获取数据列表
        List<CourseBase> list = pageResult.getRecords();
        // 获取数据总数
        long total = pageResult.getTotal();
        // 构建结果集
        PageResult<CourseBase> courseBasePageResult = new PageResult<>(
                list, total,
                pageParams.getPageNo(),
                pageParams.getPageSize());
        return courseBasePageResult;

    }

    /**
     * 添加课程信息
     *
     * @param companyId 教学机构id
     * @param dto       课程基本信息
     * @return CourseBaseInfoDto
     */
    @Override
    public CourseBaseInfoDto createCourseBase(Long companyId, AddCourseDto dto) {

        //合法性校验  公司里面 项目组 老大说前端后端不需要校验  (校验哪些数据 听老大的 )
        //StringUtils  字符串的工具类 判断空字符串是 apache.commons.lang3; 的工具类
        if (StringUtils.isBlank(dto.getName())) {
            throw new XueChengPlusException("课程名称为空");
        }

        if (StringUtils.isBlank(dto.getMt())) {
            throw new XueChengPlusException("课程分类为空");
        }

        if (StringUtils.isBlank(dto.getSt())) {
            throw new XueChengPlusException("课程分类为空");
        }

        if (StringUtils.isBlank(dto.getGrade())) {
            throw new XueChengPlusException("课程等级为空");
        }

        if (StringUtils.isBlank(dto.getTeachmode())) {
            throw new XueChengPlusException("教育模式为空");
        }

        if (StringUtils.isBlank(dto.getUsers())) {
            throw new XueChengPlusException("适应人群");
        }

        if (StringUtils.isBlank(dto.getCharge())) {
            throw new XueChengPlusException("收费规则为空");
        }
        //新增对象
        CourseBase courseBaseNew = new CourseBase();
        //将填写的课程信息赋值给新增对象
        BeanUtils.copyProperties(dto, courseBaseNew);
        //设置审核状态
        courseBaseNew.setAuditStatus("202002");
        //设置发布状态
        courseBaseNew.setStatus("203001");
        //机构id
        courseBaseNew.setCompanyId(companyId);
        //添加时间
        courseBaseNew.setCreateDate(new Date());
        //插入课程基本信息表
        int insert = courseBaseMapper.insert(courseBaseNew);
        if (insert <= 0) {
            throw new RuntimeException("新增课程基本信息失败");
        }
        //向课程营销表保存课程营销信息
        //课程营销信息
        CourseMarket courseMarketNew = new CourseMarket();
        Long courseId = courseBaseNew.getId();
        BeanUtils.copyProperties(dto, courseMarketNew);
        courseMarketNew.setId(courseId);
        int i = saveCourseMarket(courseMarketNew);
        if (i <= 0) {
            throw new RuntimeException("保存课程营销信息失败");
        }
        //查询课程基本信息及营销信息并返回
        return getCourseBaseInfo(courseId);
    }

    @Autowired
    private CourseMarketMapper courseMarketMapper;

    @Autowired
    private CourseCategoryMapper courseCategoryMapper;

    //保存课程营销信息
    private int saveCourseMarket(CourseMarket courseMarketNew) {
        //收费规则
        String charge = courseMarketNew.getCharge();
        if (StringUtils.isBlank(charge)) {
            throw new RuntimeException("收费规则没有选择");
        }
        //收费规则为收费
        if (charge.equals("201001")) {
            if (courseMarketNew.getPrice() == null || courseMarketNew.getPrice().floatValue() <= 0) {
                throw new RuntimeException("课程为收费价格不能为空且必须大于0");
            }
        }
        //根据id从课程营销表查询
        CourseMarket courseMarketObj = courseMarketMapper.selectById(courseMarketNew.getId());
        if (courseMarketObj == null) {
            return courseMarketMapper.insert(courseMarketNew);
        } else {
            BeanUtils.copyProperties(courseMarketNew, courseMarketObj);
            courseMarketObj.setId(courseMarketNew.getId());
            return courseMarketMapper.updateById(courseMarketObj);
        }
    }

    //根据课程id查询课程基本信息，包括基本信息和营销信息
    public CourseBaseInfoDto getCourseBaseInfo(long courseId) {

        //查询基本的课程信息
        CourseBase courseBase = courseBaseMapper.selectById(courseId);
        if (courseBase == null) {
            return null;
        }

        //查询 课程的营销信息
        CourseMarket courseMarket = courseMarketMapper.selectById(courseId);
        CourseBaseInfoDto courseBaseInfoDto = new CourseBaseInfoDto();

        //把上面的2个对象 组成 CourseBaseInfoDto 返回
        BeanUtils.copyProperties(courseBase, courseBaseInfoDto);
        if (courseMarket != null) {
            BeanUtils.copyProperties(courseMarket, courseBaseInfoDto);
        }

        //查询分类名称
        CourseCategory courseCategoryBySt = courseCategoryMapper
                .selectById(courseBase.getSt());
        courseBaseInfoDto.setStName(courseCategoryBySt.getName());
        CourseCategory courseCategoryByMt = courseCategoryMapper
                .selectById(courseBase.getMt());
        courseBaseInfoDto.setMtName(courseCategoryByMt.getName());

        return courseBaseInfoDto;
    }

    @Override
    @Transactional
    public CourseBaseInfoDto updateCourseBase(Long companyId, EditCourseDto dto) {

        //课程id
        Long courseId = dto.getId();
        CourseBase courseBase = courseBaseMapper.selectById(courseId);
        if(courseBase==null){
            XueChengPlusException.cast("课程不存在");
        }

        //校验本机构只能修改本机构的课程
        if(!courseBase.getCompanyId().equals(companyId)){
            XueChengPlusException.cast("本机构只能修改本机构的课程");
        }

        //封装基本信息的数据
        BeanUtils.copyProperties(dto,courseBase);
        courseBase.setChangeDate(new Date());

        //更新课程基本信息
        int i = courseBaseMapper.updateById(courseBase);

        //封装营销信息的数据
        CourseMarket courseMarket = new CourseMarket();
        BeanUtils.copyProperties(dto,courseMarket);
        saveCourseMarket(courseMarket);
        //查询课程信息
        CourseBaseInfoDto courseBaseInfo = this.getCourseBaseInfo(courseId);

        return courseBaseInfo;
    }

}

